Sets the match function for completion to be func.
The match function is used to determine if a row should or should not be in the completion list.
the gtk.entry_completion.EntryCompletionMatchFunc to use
Deprecated: GtkEntryCompletion will be removed in GTK 5.
Sets the match function for completion to be func.
The match function is used to determine if a row should or should not be in the completion list.